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The J.O. Supplies Company buys calculators from a Korean supplier. The probability of a defective calculator is 10%. If 10 calculators... The J.O. Supplies Company ... defective calculator is 10%. If 10 calculators are selected at random, what is the probability that 4 or more of the calculators will be defective?
suppose that in the setting of the previous exercise you are willing to settle for a margin of error of $1000. will the required sample size be larger or smaller?
Wwith standard deviation of 3.8 miles. Find a 99% confidence interval for the population mean number of weekly miles denise runs.
An experiment is designed to test the potency of a drug on 20 rats. Previous animal studies have shown that 10-mg dose of the drug is lethal 5% of the time within the first 4 hours; of the animals alive at 4 hours, 10% will die in the next 4 hours..
Using a level of significance of .05, is there evidence that the dual degree students are receiving lower grades? Explain.
Develop a 99% confidence interval for the population proportion.
If you were with the franchisee, would you want the level of significance to be higher or lower? why? if you used the franchisee's level of significance, would your power be higher or lower than before or would it not change?
What is a hypothesis? Specifically, is it a statement about the population or the sample? What is the purpose of hypothesis testing?
Assume the data for the three groups are independent and the data are approximately Normal. The P-value is less than 0.01. The correct conclusion is that
To exercise your skills, you are to perform the following using different tools available to you (e.g. Excel spreadsheet, graphing calculator, etc.) and write and explanation on your findings:
Decileter and standard deviation of 41 mg/dl. in an srs of 100 men what is the probability that x bar takes a value between 185 and 191 mg/dl?
a) Determine the proportion of instances that the duration was less than 240 seconds. Also express the proportion as a percent. (hint: proportion is number of successes divided by total number.)
If the match ends when one of the teams has scored k more points than the other, find the probability that team 1 wins.
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